I discovered my jointer blade had rust on it, at first I wondered how that happened, but then I found that all the wood I had recently jointed was now all warped, uneven, not straight, and most of all ... not useable. What happened there?? Well when the wood is not dry, what happens you skim off the top of the wood that is dry, exposing the inside of the wet wood, that immediately starts to expel the moisture. The industry standard for moisture content of wood is 9%. #woodworking